1. Introduction
This manual provides essential information for the safe and effective use of your SubZero P18SX PA Active DSP Subwoofer. The P18SX is designed to produce powerful, extended low frequencies, featuring advanced DSP technology with multiple profiles to optimize sound for various applications and environments. Please read this manual thoroughly before operating the device and retain it for future reference.
2. Safety Instructions
To reduce the risk of electric shock, fire, or injury, always observe the following basic safety precautions:
- Power Source: Connect the unit only to an AC power outlet of the specified voltage.
- Grounding: Ensure the power cord is properly grounded to prevent electric shock.
- Moisture: Do not expose the unit to rain or moisture. Do not place objects filled with liquids, such as vases, on the unit.
- Ventilation: Ensure adequate ventilation. Do not block ventilation openings.
- Heat: Do not place the unit near heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
- Cleaning: Unplug the unit from the power outlet before cleaning. Use a dry cloth only.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Placement: Place the subwoofer on a stable, level surface. Ensure it is positioned securely to prevent tipping.
3. Package Contents
Verify that your package contains the following items:
- SubZero P18SX PA Active DSP Subwoofer
- Power Cable
- User Manual (this document)
If any items are missing or damaged, please contact your retailer.
4. Product Overview and Features
The SubZero P18SX is a robust and powerful active subwoofer designed for professional audio applications. It features an 18-inch woofer with a 4-inch voice coil, capable of delivering 3200W peak power and extending low frequencies down to 30 Hz.
Key Features:
- Integrated DSP technology with multiple sound profiles.
- 3200W peak output power.
- 18-inch woofer with 4-inch voice coil for extended low-frequency response.
- Adjustable phase and location settings for optimal sound coupling.
- Durable wooden cabinet construction.
- Two integrated side handles for transport.
- XLR input and output connections.
Image 4.1: Front view of the SubZero P18SX PA Active DSP Subwoofer. This image displays the front grille and the overall robust design of the unit.
Image 4.2: Angled front-side view of the SubZero P18SX subwoofer. This perspective highlights the depth and construction of the cabinet.
Image 4.3: Side view of the subwoofer, showing integrated carrying handles. These handles facilitate easier transport of the unit.
5. Controls and Connections
The rear panel of the P18SX houses all essential controls and connection points for integration into your PA system.
Image 5.1: Rear panel of the SubZero P18SX, displaying the DSP control module, input/output connections, and power inlet.
Image 5.2: Detailed view of the DSP control panel on the rear of the subwoofer, showing the display, rotary encoder, and XLR connectors.
Rear Panel Components:
- DSP Control Module: Features a display and a rotary encoder (MASTER knob) for navigating menus and adjusting settings.
- INPUT 1 / INPUT 2 (XLR): Balanced XLR inputs for connecting audio sources from a mixer or other audio devices.
- OUTPUT 1 / OUTPUT 2 (XLR): Balanced XLR outputs for connecting to full-range PA speakers or other subwoofers. These typically pass through the input signal, often with a high-pass filter applied by the DSP.
- Power Inlet: Connection point for the AC power cable.
- Power Switch: Turns the unit on or off.
6. Setup
6.1 Placement
Proper placement of the subwoofer is crucial for optimal sound performance. Consider the following:
- Floor Placement: The P18SX is designed for floor placement. Ensure it is on a stable, level surface.
- Corner Placement: Placing the subwoofer in a corner can increase bass output, but may also lead to uneven frequency response. Experiment with placement to find the best balance.
- Proximity to Walls: Placing the subwoofer close to a wall can reinforce bass frequencies.
- Pole Mount: The bottom of the subwoofer includes a pole mount socket for integrating a satellite speaker above it (pole not included).
Image 6.1: Bottom view of the subwoofer, showing the pole mount socket and rubber feet. The pole mount allows for stacking a full-range speaker on top.
6.2 Connecting Audio
- Connect the main output of your mixer or audio interface to the INPUT 1 or INPUT 2 XLR connector on the subwoofer using a balanced XLR cable.
- If connecting full-range PA speakers, connect the OUTPUT 1 or OUTPUT 2 XLR connector on the subwoofer to the input of your full-range speaker(s). The DSP will typically apply a crossover, sending low frequencies to the subwoofer and higher frequencies to the outputs.
6.3 Powering On/Off
- Ensure all audio connections are secure before connecting the power cable.
- Connect the supplied power cable to the power inlet on the rear panel and then to a suitable AC power outlet.
- Turn on the subwoofer using the power switch. It is recommended to turn on subwoofers last in your audio chain and turn them off first.
7. Operation
The P18SX features a DSP control module for fine-tuning its performance.
7.1 DSP Presets
The DSP offers various sound profiles optimized for different applications. Use the MASTER knob to navigate the menu and select a preset:
- Music: Optimized for general music playback, providing a balanced bass response.
- Live: Suitable for live sound reinforcement, often with a slightly more pronounced attack.
- Speech: Designed to minimize excessive bass for spoken word applications, improving clarity.
- (Other presets may be available; refer to the on-screen menu for specific options.)
7.2 Level Adjustment
The MASTER knob also controls the overall output level of the subwoofer. Rotate the knob to increase or decrease the volume. Monitor the display for the current level setting (e.g., 'LEVEL 00dB').
7.3 Phase Control
Phase adjustment helps to align the subwoofer's output with your main speakers, preventing cancellation or reinforcement issues at the crossover frequency. Access the phase setting through the DSP menu and select between 0° (normal) and 180° (reversed) phase. Experiment with both settings to determine which provides the most coherent and impactful bass response in your listening environment.
7.4 Location Settings
The DSP may include settings to optimize performance based on the subwoofer's physical location (e.g., 'Corner', 'Wall', 'Free Field'). Select the setting that best matches your setup to improve acoustic coupling and overall sound quality.
8. Maintenance
Regular maintenance ensures the longevity and optimal performance of your subwoofer.
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners, waxes, or solvents.
- Ventilation: Keep ventilation openings clear of dust and debris.
- Storage: When not in use for extended periods, store the subwoofer in a dry, dust-free environment.
- Inspection: Periodically check the power cable and audio cables for any signs of damage. Replace damaged cables immediately.
9. Troubleshooting
If you encounter issues with your SubZero P18SX, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | No power; Incorrect audio connections; Input level too low; Subwoofer muted. | Check power cable and switch; Verify XLR connections; Increase input level from source; Check DSP settings for mute. |
| Distorted sound | Input signal too high (clipping); Damaged speaker component; Incorrect DSP settings. | Reduce input level from source; Check DSP settings; If distortion persists, contact service. |
| Weak or muddy bass | Incorrect phase setting; Poor placement; DSP preset not suitable. | Adjust phase (0°/180°); Experiment with subwoofer placement; Select a different DSP preset. |
| Subwoofer not turning on | No power to outlet; Faulty power cable; Internal fault. | Check power outlet with another device; Try a different power cable; Contact service if issue persists. |
If the problem persists after attempting these solutions, please contact qualified service personnel.
10. Specifications
| Feature | Specification |
|---|---|
| Brand | SubZero |
| Model | P18SX |
| Maximum Output Power | 3200 Watt (Peak) |
| Woofer Size | 18 inches |
| Voice Coil | 4 inches |
| Frequency Response | Down to 30 Hz (Low-frequency extension) |
| Audio Input/Output | 2x XLR (Balanced) |
| Weight | 51.25 Kilograms |
| Country of Origin | China |
Note: Specifications are subject to change without notice.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided by your retailer or visit the official SubZero website. Keep your proof of purchase for warranty claims.
